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A208791
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Number of nX3 0..2 arrays with no element equal the average of immediate neighbors vertically above, diagonally above and left, and horizontally left of it
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1
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12, 160, 2284, 32446, 461280, 6557958, 93227592, 1325375622, 18841850112, 267863199566, 3808028293448, 54136282267542, 769619639908176, 10941178835048766, 155543535899731032, 2211260341782871974
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 4*a(n-1) +123*a(n-2) +332*a(n-3) -170*a(n-4) -796*a(n-5) +124*a(n-6) +464*a(n-7) -88*a(n-8) -16*a(n-9)
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EXAMPLE
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Some solutions for n=4
..0..1..0....2..1..0....1..2..1....2..0..1....0..1..2....2..1..2....2..0..1
..2..0..2....0..2..2....2..1..1....0..0..2....1..2..0....1..2..1....0..0..2
..0..0..1....1..0..2....1..0..1....2..0..0....0..2..0....0..2..1....1..0..2
..1..0..0....2..2..2....2..2..2....1..0..1....2..0..1....1..2..2....2..2..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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